检索结果-内蒙古大学图书馆

45th European Conference on Optical Communication (ECOC 2019)

作者： Jitao Gao Elham Nazemosadat Jochen Schröder Chen Yang Songnian Fu Ming Tang deming Liu Weijun Tong Magnus Karlsson Peter A Andrekson National Engineering Laboratory for Next Generation Internet Access System School of Optics and Electronic Information Huazhong University of Science and Technology 430074 Wuhan China Photonics Laboratory Department of Microtechnology and Nanoscience Chalmers University of Technology SE-41296 Gothenburg Sweden R&D Center Yangtze Optical Fibre and Cable Joint Stock Limited Company (YOFC) 430073 Wuhan China

We present the design and fabrication of a dispersion tailored highly nonlinear few-mode fibre with an inter-modal nonlinear coefficient of 2.81 (W · km) −1 , the highest reported to date. Inter-modal wavelength ...

ISBN: (纸本)9781839531859

关键词：

来源：评论

学校读者我要写书评

暂无评论

作为可生物降解植入体替代材料的热轧AZ31B镁合金的磨损行为（英文）

引用

Transactions of Nonferrous Metals Society of China 2017年第12期27卷 2598-2606页

作者： Faruk MErT Magnum Engineering Medical R&D Company Department of Manufacturing Engineering Faculty of Technology Gazi University

植入体材料的表面完整性和摩擦学行为对其在人体内的性能有着至关重要的影响。热轧AZ31B镁合金是一种可生物降解的优良植入体材料,本文对其摩擦磨损行为进行研究。在干滑动条件下,采用热处理高碳钢盘作为对偶材料,固定滑动距离为5000 m... 详细信息

植入体材料的表面完整性和摩擦学行为对其在人体内的性能有着至关重要的影响。热轧AZ31B镁合金是一种可生物降解的优良植入体材料,本文对其摩擦磨损行为进行研究。在干滑动条件下,采用热处理高碳钢盘作为对偶材料,固定滑动距离为5000 m,测量滑动速率分别为0.25、0.5、1和2 m/s以及载荷分别为10、20、40和80 N的材料磨损率。采用SEM/EdS表征材料的微观磨损表面,并绘制材料的磨损机制图。根据实验结果,在载荷20 N和滑动速率0.25 m/s时发生磨粒磨损,而在载荷80 N和滑动速率2 m时熔化磨损占主导地位。结果表明,在高载荷和高滑动速率情况下,超严重的塑性变形是主要的磨损机制。因此,热轧AZ31B镁合金由于具有细小的显微组织和高的硬度而表现出良好的耐磨性。

关键词：干滑动磨损生物材料 AZ31B镁合金磨损机制磨损图

来源：评论

学校读者我要写书评

暂无评论

Impact of fracturing liquid absorption on the production and water-block unlocking for shale gas reservoir

Advances in Geo-Energy Research

引用

Advances in Geo-Energy research 2018年第2期2卷 163-172页

作者： Shen, Yinghao Ge, Hongkui Zhang, Xiuling Chang, Long Liu, dunqing Liu, Junrong Unconventional Natural Gas Institute China University of Petroleum Beijing102249 China State Key Laboratory of Petroleum Resources and Prospecting Beijing102249 China China University of Petroleum Beijing Xinjiang Karamay834000 China CNPC Engineering Technology R&D Company Limited Beijing102206 China

A large amount of liquid is pumped into the shale gas reservoir during hydraulic fracturing, and the fluid flowback ratio is usually low. However, field experience showed that the liquids did not cause severe damage to shale gas reservoir. It is urgent to clarify the water block unlocking mechanism of a shale gas reservoir. This work is to discuss the water block unlocking mechanism in shale gas reservoir. Based on the characteristic study of shale gas formation, the fracturing fluid absorption mechanism, absorption ability and impact on shale gas formation damage are systematically studied. Study shows that ultra-low water saturation, abundant micro-to nanotubulars and a huge contact area are the control factors for strong fluid absorption ability of gas-shale. The strong water absorption capacity of the shale gas formation matrix is a key factor in removing water block. Organic matter also has an important influence on absorption ability and gas production. A conceptual evaluation criterion for water block unlocking is proposed based on core absorption capacity, original water saturation and fracture density. The shut-in after hydraulic fracturing is beneficial to gas production and can reduce water production for certain shale gas reservoir. © The Author(s) 2018.

关键词： Hydraulic fracturing

来源：评论

学校读者我要写书评

暂无评论

Carrier Beating Impairment of PAM, CAP and dMT in Multicore Fiber Based IM/dd Systems

Carrier Beating Impairment of PAM, CAP and DMT in Multicore ...

引用

Asia Communications and Photonics Conference

作者： Lin Gan Jiajun Zhou Ming Tang rui Lin Songnian Fu Chen Yang Weijun Tong deming Liu Wuhan National Lab for Optoelectronics (WNLO) & National Engineering Laboratory for Next Generation Internet Access System (NGIA) School of Optical and Electronic Information Huazhong University of Science and Technology (HUST) Wuhan 430074 China Dept. of Electrical Engineering at Chalmers Tekniska Högskola Sweden State Key Laboratory of Optical Fiber and Cable Manufacture Technology Yangtze Optical Fiber and Cable Joint Stock Limited Company (YOFC). R&D Center

Crosstalk will introduce significant carrier beating impairment in multicore fiber based IM/dd links. For PAM, CAP and dMT, experimental results show CAP format has the highest tolerance to the carrier beating impairm... 详细信息

ISBN: (纸本)9781943580705

关键词： Frequency modulation Laser sources Multicore fibers Optical signals Signal processing Variable optical attenuators

来源：评论

学校读者我要写书评

暂无评论

Functional composite material design using Hansen solubility parameters

Results in Materials

引用

results in Materials 2019年 4卷

作者： Tsutsumi, Shinichi Kato, Yuki Namba, Kensuke Yamamoto, Hideki Basic Technology Development Department 1 R&D Center Industrial Device Business Division Industrial Solutions Company Panasonic Corporation 7-1-1 Morofuku Daito Osaka Japan Department of Chemical Energy and Environmental Engineering Faculty of Environmental and Urban Engineering Kansai University 3-3-35 Yamate-cho Suita Osaka Japan

Functional composite materials have been applied in various fields, such as conductivity, magnetism, heat conduction, and as structural materials. Many functional composite materials exhibit an improved performance by surface treatment of the filler. To theoretically consider this composite material design, we introduced Hansen solubility parameters (HSPs) to the evaluation of surface treatment agents. In this paper, in a bonded magnet composed of resin and magnet powder, the HSP of magnet powder treated with a silane coupling agent was evaluated by both calculation and measurement to confirm the effectiveness of the HSP. As a result, a correlation was found between the calculated HSP of the silane coupling agent and the fluidity of the bonded magnet. A strong correlation was also observed between the HSP and the fluidity of the silane coupling agent-treated magnet powder. From the above, the applicability of the HSP to composite material design is shown to be enhanced. © 2019 The Author(s)

关键词： Capillary penetration method Composite material dispersion Hansen solubility parameter Silane coupling agent

来源：评论

学校读者我要写书评

暂无评论

Evaluation of a Motion Seat System for reduction of a driver’s Passive Task-related (Tr) Fatigue

引用

Proceedings of the Human Factors and Ergonomics Society Annual Meeting 2018年第1期62卷 1843 - 1847页

作者： Seunghoon Lee Minjae Kim Sunwoo Choi Heecheon You Department of Industrial and Management Engineering Pohang University of Science and Technology Pohang South Korea Body Trim Development Team R&D Division Hyundai Motor Company Hwaseong South Korea

A passive task-related (Tr) fatigue that occurs monotonous driving environment can degrade driver's alertness and performance, thereby impairing driving safety. This study evaluated the driver's passive Tr fatigue reduction effect of the motion seat system in terms of driving performance, physiological response, and subjective fatigue. 17 Korean drivers (6 females and 11 males) measured the driving performance (standard deviation of lane position, SdLP; break reaction time, BrT), percentage of eye closure (PErCLOS), and standard deviation of NN interval (SdNN) of the ECG during simulated driving for 90 minutes on a monotonous highway. The evaluation of the driving consisted of the first half (45 min) and the second half (45 min), while static seat condition in the first half and seat motion (bow, wave motion profile) condition in the second half. during static seat condition driving, SdLP, BrT, and PErCLOS were significantly higher (α = .05) in the second half compared with first half by 6.0 cm, 92.8 msec and 1.3%, respectively. However, there was no significant difference between first half and second half under motion seat conditions. In addition, subjective passive mental fatigue was observed to be 1.2 times lower during motion seat conditions than static seat condition (p < 0.01). The results of this study indicated that motion seat system have some effect on the driver’s passive Tr fatigue reduction. Our findings may not extend to on road driving condition because we tested only simulation driving condition. Therefore, effect of motion seat system on driver’s passive Tr fatigue need to be evaluated in future studies under real road condition.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Study on Forming technology of TBM disc Cutter ring

Study on Forming Technology of TBM Disc Cutter Ring

引用

作者： Yong Hu Maosen Li Zhongguo Fu Yikai Hu Aiwu Zhang Changye Cao Key Laboratory of CNC Equipment Reliability Ministry of EducationJilin University School of Mechanical and Aerospace Engineering Jilin University Faw Jiefang Automotive Company Key Laboratory of Cutting Tool Technology of Shield and Tunnelling of Jilin Province Jilin Welter tunnel equipment Co.Ltd. Overall R&D department CRRC Changchun Railway Vehicles Co.Ltd.

The tunnels and underground projects bring an unprecedented development of hard rock tunneling *** forming process and material properties of the 20 inch disc cutter ring has been studied by the finite element simulation and test *** effects of blank size,blank heating temperature,mold preheating temperature and friction coefficient on the forming load,minimum surface temperature and blank deformation uniformity of 20 inch cutter ring were *** results show the optimum combination of the forming process of the 20 inch disc cutter ring is when the blank height is 90 mm,the blank heating temperature is 1200 °C,the preheating temperature is 280 °C,and the friction coefficient is *** test and hardness test were carried out on the edge material of the cutter *** test results show that when the temperature exceeds 600 °C,the hardness and compressive strength of the cutter ring material will drop ***,the TBM should be properly cooled during *** research results in this paper can provide a basis for the optimization of TBM disc cutter ring processing technology and engineering applications.

关键词： Study on Forming technology of TBM disc Cutter ring TBM

来源：评论

学校读者我要写书评

暂无评论

Novel acid soluble consolidating material to overcome lost circulation problems in reservoir intervals

引用

IOP Conference Series: Materials Science and engineering 2019年第1期634卷

作者： J Feng L H Zheng L Li H J Hao C Zhang Z Zhang College of Petroleum Engineering China University of Petroleum (Beijing) Beijing 102249 China CNPC Engineering Technology R & D Company Limited Beijing 102206 China PetroChina Qinghai Oilfield Company Dunhuang 736202 China Petrochina Tarim Oilfield Company Korla 841000 China

Based on lost circulation problem, a new kind of acid soluble consolidating material was developed, and the sealing characteristics were evaluated. This acid soluble consolidating material had the characteristics of rapid water loss, high filter-cake consistency and high acid dissolution. The results indicated that the obtained curing slug had good stability at high temperature, and the sealing strength of curing slug was as high as 10 MPa. High temperature and high pressure (HTHP) sealing analog experiment indicated that the maximum pressure-bearing capacity of plugged zone was up to 18.5 MPa. Using this consolidating material to seal the shale is a very powerful and economical approach to address lost circulation problem in troublesome thief zones.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Improved algorithms and coupled neutron-photon transport for auto-importance sampling method

引用

Chinese Physics C 2017年第1期41卷 100-109页

作者：王鑫李君利武祯邱睿李春艳梁漫春张辉刚直徐红 Department of Engineering Physics Tsinghua University Beijing 100084 China Key Laboratory of Particle ＆ Radiation Imaging Ministry of Education Beijing 100084 China Nuctech Company Limited Beijing 100084 China State Nuclear Hua Qing (Beijing) Nuclear Power Technology R＆D Center Co. Ltd. Beijing 102209 China

The Auto-Importance Sampling（AIS） method is a Monte Carlo variance reduction technique proposed for deep penetration problems, which can significantly improve computational efficiency without pre-calculations for importance distribution. However, the AIS method is only validated with several simple examples, and cannot be used for coupled neutron-photon transport. This paper presents improved algorithms for the AIS method, including particle transport, fictitious particle creation and adjustment, fictitious surface geometry, random number allocation and calculation of the estimated relative error. These improvements allow the AIS method to be applied to complicated deep penetration problems with complex geometry and multiple materials. A Completely coupled Neutron-Photon Auto-Importance Sampling（CNP-AIS） method is proposed to solve the deep penetration problems of coupled neutron-photon transport using the improved algorithms. The NUrEG/Cr-6115 PWr benchmark was calculated by using the methods of CNP-AIS, geometry splitting with russian roulette and analog Monte Carlo, respectively. The calculation results of CNP-AIS are in good agreement with those of geometry splitting with russian roulette and the benchmark solutions. The computational efficiency of CNP-AIS for both neutron and photon is much better than that of geometry splitting with russian roulette in most cases, and increased by several orders of magnitude compared with that of the analog Monte Carlo.

关键词： Monte Carlo deep penetration auto-importance sampling coupled neutron-photon transport

来源：评论

学校读者我要写书评

暂无评论

Mechanical behaviors of cement systems in different conditions

引用

Natural Gas Industry B 2017年第3期4卷 212-216页

作者： Zheng, Youzhi Xu, Bingqing Pu, Junhong Mu, Naiqu Wang, Bin Li, Ming Engineering Technology Research Institute PetroChina Southwest Oil & Gas Field Company Guanghan 618300 Sichuan China Engineering Technology Research Institute National Energy High Sulfur Exploitation R&D Center Guanghan 618300 Sichuan China Engineering Division PetroChina Southwest Oil & Gas Field Company Chengdu 610051 Sichuan China Northeast Sichuan Division PetroChina Southwest Oil & Gas Field Company Chengdu 610051 Sichuan China Sichuan Changning Natural Gas Development Ltd. PetroChina Southwest Oil & Gas Field Company Chengdu 610051 Sichuan China School of Material Science and Engineering Southwest Petroleum University Chengdu 610500 Sichuan China

At present, the mechanical testing on the ductility of cement sheath is faced with multiple technical difficulties. In this paper, numerical simulation and laboratory evaluation were adopted to compare the mechanical performance of typical elastic, flexible, ductile and neat cement systems at home and abroad by different loading rates, value range of stress–strain curve, confining pressure and temperature. It is shown that when the loading rate is lower, the stress–strain curve of set cement is not smooth, but distorted, and the stress cannot be responded in time;that when the loading rate is higher, the stress–strain curve of set cement is smooth, and the yield stage is remarkable, indicating that higher loading rate can reflect the yield strain behavior of set cement more truly;that the recommended Young's modulus range of set cement should be changed based on the actual downhole conditions;that temperature has more effect on yield stress and ultimate strain, but less effect on elastic modulus;that confining pressure has more effect on ultimate stress and ultimate strain, but less effect on elastic modulus;and that when the confining pressure is lower and temperature is higher, the yield stage of set cement is more remarkable. It is concluded that these mechanical behaviors of cement system in different conditions provide a technical support for understanding the mechanical essence of downhole cement sheath and exploring the mechanical integrity of cement sheath and even that of the whole wellbore. © 2017 Sichuan Petroleum Administration

关键词： Confining pressure Loading rate Mechanical testing on ductility of cement sheath Set cement Stress–strain Temperature Well cementing

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：